Tyson Ross, the only A's player from the Oakland area, was shifted into the bullpen before the end of the season, and now he's making an even bigger move: to San Diego.

The A's traded the 25-year-old right-hander to the Padres on Friday along with minor-league first baseman A.J. Kirby-Jones. In return, they received a shortstop option for next season in switch-hitting Andy Parrino and left-handed starter Andrew Werner.

Ross, who attended Bishop O'Dowd High School and Cal, was the A's second-round pick in 2008, but he never gained a real foothold in the rotation despite call-ups each of the past three seasons. He went 2-11 with a 6.50 ERA in 2012.

"We were thrilled to have Tyson, who grew up in the shadow of the Coliseum, play for his hometown team over the last three seasons," assistant general manager David Forst said in an e-mail. "He was an outstanding ambassador for the A's on the field and in his own community during his time here."

Ross said by phone Friday that he is sad to leave Oakland, but knowing that the A's rotation is full, "San Diego might be a better opportunity for me to be a starting pitcher."

In addition, his younger brother, Joe Ross, is in the Padres' minor-league system. Tyson Ross said he told his brother he'd been traded Friday by saying, "Joe, your GM called. He says hi."

Parrino, 27, hit .207 with a homer and six RBIs in 55 games with the Padres, 26 of them at shortstop.

Should the A's fail to re-sign Stephen Drew, Parrino will be a candidate to start.

"He's definitely in the mix as we continue to survey our options," Forst said.

"It would be an honor to fight for that job," Parrino said by phone. He is most comfortable at shortstop, but he also plays second, third and the corner outfield spots.

Parrino said that he'd watched the A's dramatic pennant stretch and was impressed with the energy of the team and the fans. "That was exciting," he said.

One major-league talent evaluator described Parrino as "a crazy-good athlete and the overachiever, grinder type."

Werner, 25, was 2-3 with a 5.58 ERA in eight starts with the Padres. He has a good changeup and some deception in his delivery, and he's likely to provide depth at Triple-A Sacramento and be a potential emergency starter in Oakland.